Microsoft has announced Windows 10 will be available starting on July 29. Windows 10 will be offered as a free upgrade for those who own Windows 7 or Windows 8.1, as long as they didn't pirate their copy of Microsoft's operating system. For those who plan on downloading Windows 10 as soon as it becomes available to them, Microsoft has released a new taskbar app that should be available for those eligible for the upgrade. All you have to do is click on Windows icon, input your email address, and you'll be prompted when Windows 10 is available to download.